Olivia Cooke, currently playing Queen Alicent Hightower in the Game of Thrones prequel, House of the Dragon, has to be one of the hardest-working and versatile actors of her generation.
With his trademark deep voice, not-quite handsome face, and flopping dark hair, Matt Smith is always recognizable. Yet he's extraordinarily versatile, appearing in everything from art-house to horror.
While it's more of an American fantasy of medieval Europe, Game of Thrones has been one of the biggest springboards for British acting talent, and Season 2 of House of the Dragon has several high-profile additions along with A-list returnees.
